This feast was established in the Traditional Calendar by Pope Pius XII for May 31st to cap off Mary's Month of May.
In AAS 38, Pius XII declared: "Mary is queen by grace, by divine relationship, by right of conquest and by singular election." He also proclaimed in Ineffabilis Deus that her queenship should be venerated "as something extraordinary, wondrous, [and] eminently holy." Medieval hymns proclaim often Mary's title as Queen such as Salve Regina, Regina Coeli, and Ave Regina Coelorum. In the Litany of the BVM or Litany of Loreto she is proclaimed Queen in 12 instances beginning with "Queen of angels" to "Queen of peace." There is also the fifth mystery of the Rosary: The Coronation of Mary as Queen of Heaven and Earth. Below is the Bouquet of Flowers and Virtues that have been offered to Our Lady throughout her month as Queen of the May. By clicking on each flower bouquet button you can see more on the flower and virtue of each day going counter-clockwise.

We pray the prayer to the Queen of Heaven and earth,

Mary, Assumed into Heaven, I venerate you as the Queen of Heaven and earth. Your own Son led you to a throne of glory in Heaven next to His own. As you tasted the bitterness of pain and sorrow with Him on earth, you now enjoy eternal bliss with Him in Heaven. I thank Jesus for having put a most beautiful crown upon your head, while all the Angels and Saints acclaim you as their Queen.

Because here below you shared in all the mysteries of our Redemption, Jesus has crowned you not only with glory but with power. He placed you at His right hand that you may dispose of the treasures of grace by a singular title - that of Mother of God.

In the midst of all the Saints you stand as their Queen and ours - dearer to the Heart of God than any creature in God's Kingdom. You pray for your children and distribute to us every grace won by our loving Savior on the Cross.

Queen Assumed into Heaven, may your glorious beauty fill my heart with a distaste for earthly things and an ardent longing for the joys of Heaven.

May your merciful eyes glance down upon my struggles and my weakness in this vale of tears. Crown me with the pure robe of innocence and grace here, and with immortality and glory in Heaven. Amen.

Resources: We are grateful to Friends of Our Lady of Fatima for providing the Propers for the faithful. Sources: Saint Andrew Daily Missal and the Marian Missal , 1945

Let us all rejoice in the Lord, celebrating a feast in honor of the Queenship of the Blessed Virgin Mary: at whose solemnity the angels rejoice and join in praising the Son of God . (Ps. 44: 2) My heart hath uttered a good word; I speak my works to the King.
v. Glory be to the Father and to the Son and to the Holy Ghost, as it was in the beginning, is now and ever shall be, world without end. Amen. Repeat Let us all rejoice...

Grant us, we implore Thee, Lord, that we who keep the festival of the Blessed Virgin Mary our Queen, may, by her assistance, obtain peace in this life and glory in the next. Through our Lord Jesus Christ, Thy Son, Who livest and reignest with Thee in the unity of the Holy Ghost, one God Forever and ever.R.Amen.

Lesson from the book of Wisdom. I came out of the mouth of the Most High, the firstborn before all
creatures. I dwelt in the highest places, and my throne is in a pillar of cloud. And I have stood in all the earth and in every people, and in every nation I have had the chief rule. And by my power I have trodden under my feet the hearts of all the high and low. He that heareneth to me shall not
be confounded, and they that work by me shall not sin. They that explain me shall have life everlasting.
Thanks be to God.

Upon his cloak and upon his thigh he hath a name written: King of kings and Lord of lord. V. The Queen takes her place at his right hand in gold of Ophir.
Alleluia Alleluia, V. Hail, merciful Queen, protect us from the enemy and receive us at the hour of death. Alleluia.

The Lord be with you.R. And with thy spirit. The continuation of the holy Gospel according to Luke. R. Glory to Thee, O Lord

At that time, the angel Gabriel was sent from God into a city of Galilee,
called Nazareth, to virgin espoused to man whose name was Joseph, of the
house of David: and the virgin's name was Mary. And the angel being come in,
said unto her: Hail, full of grace, the Lord is with thee: blessed art thou
among women. Who having heard, was troubled at his saying and thought with
herself what manner of salutation this should be. And the angel said to her:
Fear not, Mary, for thou hast found grace with God. Behold thou shalt
conceive in thy womb and shalt bring forth a Son; and thou shalt call his
name Jesus. He shall be great and shall be called the Son of the Most High,
and the Lord God shall give unto Him the throne of David His father: and He
shall reign in the house of Jacob forever, and of His kingdom there shall be
no end.
Praise be to Christ

Receive, O Lord, we implore Thee, the gifts of Thy rejoicing Church, and grant that through the merits of the blessed Virgin Mary, our Queen, they may avail to our salvation. Through Jesus Christ, Thy Son, Our Lord, Who liveth and reigneth with Thee in the unity of the same Holy Ghost, God, Forever and ever.R.Amen.

The Lord be with you. R. And with thy spirit.
Lift up your hearts.R.We have lifted them up to the Lord.Let us give thanks to the Lord our God. R. It is meet and just. It is truly meet and just, right and for our salvation, that we should at
all times and in all places, give thanks unto Thee, O holy Lord, Father
almighty, everlasting God and that we should praise and bless, and proclaim
Thee, on the Feast of the Annunciation of the Blessed Mary, ever Virgin: Who
also conceived Thine only-begotten Son by the over-shadowing of the Holy
Ghost, and the glory of her virginity still abiding, gave forth to the world
the everlasting light, Jesus Christ our Lord. Through whom the angels praise
Thy Majesty, the Dominations worship it, and the Powers stand in awe. The
heavens and the heavenly hosts together with the blessed Seraphim in
triumphant chorus unite to celebrate it. Together with them we entreat
Thee, that Thou mayest bid our voices also to be admitted, while we say with
lowly praise:
HOLY, HOLY, HOLY...

The Lord be with you. R. And with thy spirit.Let us pray. With joy we have celebrated these mysteries, O Lord, on the feast of the blessed Virgin Mary, our Queen; we beseech Thee that as they have been performed with joy in her honor, so by her intercession they may avail for our salvation. Through our Lord Jesus Christ, Thy Son, Who liveth and reigneth with Thee in the unity of the Holy Ghost, one God Forever and ever. R. Amen.